must case
Verbe régulier : case - cased- cased
Traduction française : mettre en boîte ou caisse - couvrir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must case
you must case
she must case
we must case
you must case
they must case 	I must be casing
you must be casing
she must be casing
we must be casing
you must be casing
they must be casing	I must have cased
you must have cased
she must have cased
we must have cased
you must have cased
they must have cased	I must have been casing
you must have been casing
she must have been casing
we must have been casing
you must have been casing
they must have been casing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not case
you must not case
she must not case
we must not case
you must not case
they must not case 	I must not be casing
you must not be casing
she must not be casing
we must not be casing
you must not be casing
they must not be casing	I must not have cased
you must not have cased
she must not have cased
we must not have cased
you must not have cased
they must not have cased	I must not have been casing
you must not have been casing
she must not have been casing
we must not have been casing
you must not have been casing
they must not have been casing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I case?
must you case?
must she case?
must we case?
must you case?
must they case? 	must I be casing?
must you be casing?
must she be casing?
must we be casing?
must you be casing?
must they be casing? 	must I have cased?
must you have cased?
must she have cased?
must we have cased?
must you have cased?
must they have cased? 	must I have been casing?
must you have been casing?
must she have been casing?
must we have been casing?
must you have been casing?
must they have been casing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not case?
must you not case?
must she not case?
must we not case?
must you not case?
must they not case? 	must I not be casing?
must you not be casing?
must she not be casing?
must we not be casing?
must you not be casing?
must they not be casing? 	must I not have cased?
must you not have cased?
must she not have cased?
must we not have cased?
must you not have cased?
must they not have cased? 	must I not have been casing?
must you not have been casing?
must she not have been casing?
must we not have been casing?
must you not have been casing?
must they not have been casing?